Roller members for use in heat sealing apparatus
CA 1106742 A · Owner: The Aro Corporation · Inventors: Clifford, Earl W.; Sorce, Peter S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Apparatus for heat sealing a thermally-sensitive material to a substrate material includes a frame, and a pair of internally heated shafts mounted fast on the frame. A roller member is rotatably mounted on each shaft and is arranged to be heated by the heating element within the shaft. The rollers are rotated in opposite angular directions so that an object interposed at the nip will be translated therebetween. The facing peripheral portions of the roller members each have a sinusoidal cross-section with the, peaks of one roller member being aligned with the valleys of the other. The roller members are spaced from one another to provide a degree of frictional resistance with the materials …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Granted August 11, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 11, 1998.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.